Method for producing ultra-high purity, optical quality, glass articles
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C03B-037/023
C03B-037/016
C03B-019/06
출원번호
US-0052619
(1987-05-20)
발명자
/ 주소
Schermerhorn Paul M. (Painted Post NY) Teter Michael P. (Corning NY) Vandewoestine Robert V. (Corning NY)
출원인 / 주소
Corning Glass Works (Corning NY 02)
인용정보
피인용 횟수 :
27인용 특허 :
13
초록▼
A method for producing ultra-high purity, optical quality, glass articles is disclosed which involves: (1) forming a gel from a silicon-containing organic compound, such as, TEOS; (2) drying the gel to produce granules having a mean particle size of less than about 1 millimeter; (3) fully sintering
A method for producing ultra-high purity, optical quality, glass articles is disclosed which involves: (1) forming a gel from a silicon-containing organic compound, such as, TEOS; (2) drying the gel to produce granules having a mean particle size of less than about 1 millimeter; (3) fully sintering the granules to produce high purity, artificial sand; (4) casting the artificial sand by conventional techniques, such as, slip casting, to form a high density, porous, green body; (5) drying and partially sintering the green body; (6) fully sintering the green body under vacuum; and (7) hot isostatic pressing (“hipping”) the green body. The glass articles produced by the process have higher purity, greater homogeneity, and less IR absorption than existing, commercially available, premium quality, fused silica, glass articles. In addition, in accordance with the invention, high purity glass articles of complex shapes can be directly cast, rather than being machined or pressed from sheets of glass, as in the prior art.
대표청구항▼
A method for producing a fused silica glass article comprising the steps of: (a) preparing a solution which contains at least one silicon-containing organic compound having the formula Si(OR)4 or SiR(OR)3, where R is an alkyl group; (b) polymerizing the silicon in the solution to form a SiO2 gel; (c
A method for producing a fused silica glass article comprising the steps of: (a) preparing a solution which contains at least one silicon-containing organic compound having the formula Si(OR)4 or SiR(OR)3, where R is an alkyl group; (b) polymerizing the silicon in the solution to form a SiO2 gel; (c) drying the gel at a rate which causes the gel to fragment into granules having a mean particle size less than about one millimeter; (d) sintering the granules at a temperature less than about 1150°C., the density of the granules after sintering being approximately equal to their maximum theoretical density; (e) forming a green body from the sintered granules; (f) drying and partially sintering the green body in a chamber by (i) raising the temperature of the chamber to above about 1000°C., and (ii) introducing chlorine gas into the chamber and/or subjecting the chamber to a vacuum and/or purging the chamber with an inert gas; and (g) fully sintering the green body in a chamber by raising the temperature of the chamber to a temperature above about 1720°C. while purging the chamber with helium or applying a vacuum to the chamber.
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이 특허에 인용된 특허 (13)
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Dawes, Steven B.; Fiacco, Richard M.; Hrdina, Kenneth E.; Wasilewski, Michael H., Doped silica glass articles and methods of forming doped silica glass boules and articles.
Allan, Douglas C.; Borrelli, Nicholas F.; Powell, William R.; Seward, III, Thomas P.; Smith, Charlene M., Method for determining laser-induced compaction in fused silica.
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Borrelli, Nicholas F.; Danielson, Paul S.; Heslin, Michael R.; Logunov, Stephan L.; Moll, Johannes; Schermerhorn, Paul M.; Smith, Charlene M., Method of inducing transmission in optical lithography preforms.
Ito Masumi (Yokohama JPX) Danzuka Toshio (Yokohama JPX) Ohga Yuichi (Yokohama JPX) Hoshino Sumio (Yokohama JPX) Tsuchiya Ichiro (Yokohama JPX), Process for production of glass preform for optical fiber including consolidating in a furnace with a temperature gradie.
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